Multi-objective optimization and performance analysis of structural parameters of open stern shaft lip seal
The open-type stern shaft seal achieves long service life and efficient operation due to its excellent opening performance,but it is very easy to cause serious lip wear due to unreasonable lip structure.Taking the open stern shaft lip seal as the research object,a lip seal numerical analysis model is established to analyse the sealing performance of the open stern shaft lip seal,and multi-objective optimization analysis of lip structure using response surface methodology for lip sealing experiments.The results of the study show that the lip excess has the greatest impact on lip seal opening performance and life,followed by spring radial force,anterior labial angle and labial angle,and the lip opens when the blowback gas pressure is at least 1.3 times greater than the working pressure under multiple force loads.Lip opening performance and lip life are affected by rotational speed,and lip opening performance is positively correlated with lip life.For the open stern shaft lip seal,the lip structure parameters are reasonably designed.By dynamically adjusting the back-blowing gas pressure,the lip wear can be effectively reduced and the sealing performance can be greatly improved,and the dependence of the lip opening on the rotation speed can be reduced.The optimized parameter combinations are:lip overfill 1.5 mm,spring radial force 70 N,anterior labial angle 45°,labial angle 40°,and through the reasonable optimization of structural design,the comprehensive lip wear reduction performance is significantly improved,and the lip life is increased by 173％.
万方数据
维普
